Fix typo in typescript.md (#6347)

Author: mattcarrollcode

src/content/learn/typescript.md

@@ -284,7 +284,7 @@ export default App = AppTSX;
 
 </Sandpack>
 
-This technique works when you have an default value which makes sense - but there are occasionally cases when you do not, and in those cases `null` can feel reasonable as a default value. However, to allow the type-system to understand your code, you need to explicitly set `ContextShape | null` on the `createContext`. 
+This technique works when you have a default value which makes sense - but there are occasionally cases when you do not, and in those cases `null` can feel reasonable as a default value. However, to allow the type-system to understand your code, you need to explicitly set `ContextShape | null` on the `createContext`. 
 
 This causes the issue that you need to eliminate the `| null` in the type for context consumers. Our recommendation is to have the hook do a runtime check for it's existence and throw an error when not present:
 
@@ -460,4 +460,4 @@ We recommend the following resources:
 
  - [React TypeScript Cheatsheet](https://react-typescript-cheatsheet.netlify.app/) is a community-maintained cheatsheet for using TypeScript with React, covering a lot of useful edge cases and providing more breadth than this document.
 
- - [TypeScript Community Discord](https://discord.com/invite/typescript) is a great place to ask questions and get help with TypeScript and React issues.
+ - [TypeScript Community Discord](https://discord.com/invite/typescript) is a great place to ask questions and get help with TypeScript and React issues.